Polishing wheel



'Patentes sev.. it, rese est@ Aokoeotiom ltiiov 23,

My invention reietes to imeroveoieots in ooi ishirig wheels and pertio'oisrlv to en improved lvvloeel body` to the circuiriieremce oi* which is se@ cured the abresive compound forms the polishing siuoce.

My improvement relates psrtieiiiesiy to tbe. type oi poiisliirig iviieel vf t t motorie-l such it seoored to f e. teorie oi' e, loosely `.sii es woven jute. i seversi lemirisitioos oi rit stloiiing or other sei eoriiitoot Wheel. body which possesw .ooe ivesririe properties end which is otiy resilient to absorb tbe sl'iocis and pressure eppiiostion oi vforis spirited to its periphery without resulting iii 'oermseeot dei ormotiori.

My improved polishing wheel is striictureliy uniform throughout. Wires the ooiisiiioe rece with which wheels oi this type are provided loos Worn down, necessitating the application ot e, new foce thereto, etici tl'ie wheel is trued up to receive sucio. new ieee, the wbeel, et such new diameter, wiil possess the seme riormol resiliency es it possessed et its originel diameter. Furthermore, it is tree from the bord pieces which are found sione the limes of stitching ie wheels where the fabric ioriiirietions ere stitched together..

Ari mmorteot ciierocteristic oi my improved Wheel is tiret the body structure termed oi the plurality of iemirietioes oi woven :teorie or time like constitutes o structuroliy territory body. These several @emotions ere secured together by s lotex eoropourid which is supoiied in suolo. e, quantity es to comprise sebsteritioilv looenioelt by Weight of the entire obesi body. "liie lotes com pound is oi sucia. e, eirorecter tl'iot it possesses e. normally perimetro-rit resliieriov oo=exteiisive with .the riormei lire of tire wiieel body. flli'le let/ex compound cerries es emtioxidoot which renders it normsiigy permomentiy tecirv sind prevents estimo of the rubber contest. itesterids throughout the entire striicture sooo-rios the several iobric ieminotioos together ered extends es e dim over the threods oi tlfie irioiividuei lemiriations ll ing the interstices therebetween end toms a, continuous resilient connective structure throughn tire ioterstices oi tile leiriinotiorxs ond between the lemirietions. it forms e. moisture resistent Film enclosing tire individuel iibers which moire up tbe several fsbric lovers.

An object is to provide suolo e. wheel body which 55 will be inexpensive, octsilf,v fabricated, oi' on integesl imitery cberecter. someieotiii Figi@ mi@ sturdy to fulil the mteritied fonction tbereoi, ond which loss e circuzrereritiei portieri or siiiJ icient resiliency ond piiobilitv .to yieid without resulting permanent deformation under the stresses received during use. This :yielding oir cumferentiai portion forms e, imitory oomtross tion with and is ori iritesrol et e eeritrei por tion, which control portieri is soicieiitly rigidi to support and Corry the omcomiereum tiel portion.

An important restore is improved polishing Wlieei possessing tire ebove recited oberacteristies is formed oi o, oloreiity ci ieroiriotioris of exibie sheet iiseterioiav suole ss woven fabric, odiiesively secured together bv e yiediiig resilient binder; and theceritrel portion of the wheel body immediotelysurrouridiiio the olds' o tire tviieei body is compressed to the point or substeotiei rigidity, while the outer portico ediooent to the circumference is compressed to e substootiollv less degree, whereby it possesses resilieriey sind is normollycompressibie and yielding.

Other objects, advantages, ood meritorious ieee tduresiviiilmore uly opposa trom tbe toiletries escr p on, speen ed claim ood e drawing, wherein: mwmwmym Figure i is s side elevstioo ot e. 'polishing vriieei l embodying my invention,

Fig. 2 kis ou elevetiori tetes. et rieiit ongles to f the View of Fig. i, sind portie broken sway to show the structure iii sectiony erid Fig. 3 is on elevotion iosrtiv to section oi one ci the composite lsmiootioos tviiicli go to .resize uo my improved Wiieei. L

Polishing Whees o this @emersi cherocter trove b heretofore been rebricsted oi s, pioreiitv or tot ric disks served together arid tiren provided ueoii the periphery of the wheel body e lever or band oi @.broslve suitetiy deoosited or thereon. This eplelicetioritorms e. coritmiotiori in part of my applicotiori Seriell No. 699,859.

In the structure ci time instemt opplieetioe employ fabric sheet materiel out into dists. i plurality of these disks are sdhesivelv secured to# @other to form s kcoiruoosite ismirietion iti., @me of these lsminatious is shown in Fig. 3. Tite separate sheet disks may be eoihesivelv secured together by le suitable composition lotes binder. Loosely woven cloth such es burlap mov be used so to form the disks. The binder extends through the interstices of the several disks, thoroughly impregneting them forming e moisture resistent fum enclosing me individuel risers which mese Y up the several layers sud edhesiveiy secos tbe te several layers together. T he binder also forms a film between theseparate disks. The latex compound used is such that it is adapted to normally permanently. retain its yielding resiliency. By latex compound I mean a water emulsion of rubber which comprises the natural product latex, modifications or compounds thereof, or artificial aqueous dispersions of rubber. In Fig. 3 Ihave shown five separate disks so securedtogether. Any suitable number may beused. Ii practice such number as was required to make up the wheel body would be employed.

In order to form the wheel body I superimpose a plurality of these separate impregnated laminations. -This pile of laminations is placed in a suitable press and subjected to the required pressure to press them tightly together. The pressure used may be such as to reduce the thickness of the laminations one half. The press is so formed that a central or axial portion I2 of the wheel body is compressed to a greater degree than the circumferential portion I4 and the pressure is such that this axial portion is rendered substantially rigid and constitutes a 'substantially inflexible supporting portion which carries the integral circumferential portion I4, which, not having been subjected to as great pressure, possesses suiiicient resiliency to yield to` the shocks which the wheel body receives during use without breakage or permanent deformation. The abrasive is secured to the periphery of the portion I4 in a suitable manner.

When the abrasive wears down the wheel may be trued up and a new coating of abrasive lsecured upon the periphery. The circumferential abrasive supporting portion of greater diameter possesses a uniform yielding character from the first. This attribute persists throughout the life of the wheel body. Due to the fabrication of a wheel body in this form and after the herein described fashion, the circumferential abrasive supporting portion yields to the desired degree as herein describedyet it is supported by the relatively rigid axial portion so that the wheel runs true and does not yieldingly deform under normal pressure except within the desired radial limits as described, and does not deform axially by bending or the like but is held by the relatively inflexible central portion against such deformation.

The several sheets are thoroughly impregnated with the latex compound and the compound passes into the interstices of the sheets. The material is of such a characterand the carrying out of the process is such that the weight of the completed body will be made up approximately equally of the sheet material and compound.v

During the compression of the sheets together the latex compound is driven through the interstices of the several sheets to such an extent that it forms a continuous normally resilient relatively tacky connectivetissue or structure extending radially and axially throughout the entire body. It extends as a connecting structure through the interstices of the several sheets connecting them together. The pressure is exerted also to such a point that the resulting body has an axial dimension approximately one half of that of the uncompressed pile of sheets. The wheel is preferably not vulcaniaed and the binder retains its tacky character. In Fig. 2 I show such a body structure as it would appear complete but with sheets exaggerated in thickness. In this figure there is also shown a polishing face lliv about the periphery of the wheel body. The particular polishing face forms no part of my invention.

I employ a compound which will retain its resiliency for the normal life of the body structure and which might therefore be termed permanently resilient. 'I'he compound also must not deteriorate with age and it must withstand the heat and other temperaturechanges throughout such a range as will be met with in the operation of the wheel. I propose to use a suitable rubber latex compound which possesses these desired characteristics. A compound which has been found satisfactory comprises: 50 c. c. m. of

rubber latex, 4 c. c. m. of saturated Burgandy pitch solution, and 2O drops of Neozone L.

The Burgandy pitch may be varied up to 6` c. c. m. with the amount of latex above set forth and the Neozone Il may be increased up to sixty drops in the formula. The pitch solution may be formed by dissolving the pitch in ammonia or some other suitable solvent to the maximum capacity of the solvent. The Neozone L is a commercial product and is an anti-oxidant.

Other similar` suitable anti-oxidants might be employed. It prevents injurious aging of the compound and preserves its tacky condition so that the laminations will remain united or will reunite following an opening up of the layers. The pitch tends to impart and to permanently preserve the tacky characteristic ofA the compound.

It will be found that the Wheel body, when compressed, possesses an inherent resiliency which will permit it to withstand considerable shock lof work being urged thereagainst without permanent deformation or development of an out-of-round condition. This resiliency is uniform as its structural character is uniform and continues throughout the normal life of the wheel. The tensile strength of the fibers is increased ,approximately one-half by the compound and the compound likewise eliminates the tendency of the fibers to break, crack, or flake off under the action of pressure thereagainst.

What I claim is:

1. A polishing wheel body formed of a plurality of loosely, coarsely woven fibrous disks impregnated with a normally permanently tacky and resilient adhesive moisture resistant binder, said disks being compressed together into an integral Wheel body with the binder` filling the interstices of the disks and adhesively securing them together.

2. A polishing wheel body formed of a plurality of loosely, coarsely woven fibrous disks impregnated with a normally permanently tacky and resilient adhesive moisture resistant binder, said disks being compressed together into an integral wheel body with the binder filling the interstices of the disks and forming a covering surrounding 'asto have an axial portion of substantially less diameter than the wheel body compressed to a substantially less axial dimension and greater rigidity than the peripheral portion of the wheel.

4. A polishing wheel body comprising a plurality of fabric layers impregnated with an antioxidant latex composition binder filling the interstices thereof and rendering the individual fibers moisture resistant, said layers being adhe= sively secured together and compacted throughout the peripheral portion of the Wheel body to substantially one half the uncompressed thickness of the plurality of layers while retaining substantial yielding resiliency, said wheel having its axial portion compacted to a substantially greater degree than the peripheral portionfand into substantial rigidity.

5. A polishing wheel body consisting of a plu.- rality of loosely integrated brous discs impregnated with and adhesively secured togetherl in compacted juxtaposition by a normally permanently tacky and resilient latex compound.

6. A polishing Wheel body consisting of a plurality of loosely integrated brous discs impregnated with a latex compound carrying a pitch. ingredient rendering the compound normally tacky, said discs being adhesively secured and compacted together.

7. A polishing wheel body formed of a plurality of fibrous discs adhesively secured compacted together and having the individual bers which make up the several discs adhesively secured together by a normally tacky and resilient latex compound. n

8. A polishing Wheel body consisting of a plurality of loosely integrated brous discs impregnated with and adhesively secured compacted together by a normally tacky resilient latex compound, said compound being uniformly distributed throughout the wheel body holding the bers which make up the same resiliently together and preventing separation or fraying thereof.Vl

9. A polishing Wheel body consisting of a plurality of loosely integrated fibrous discs impreg-4 nated with and adhesively secured together in compacted juxtaposition by a normally permanently tacky and resilient latex compound, said Wheel body having a portion adjacent to its axis of substantially greater density and' less yielding than the portion adjacent to its periphery.

' RAY W. SPRINGER. 

